Technical classes

OSB (EN 300)

OSB/1- General purpose boards, and boards for interior fitments (including furniture) for use in dry conditions.
OSB/2 - Load-bearing boards for use in dry conditions.
OSB/3 - Load-bearing boards for use in humid conditions
OSB/4 - Heavy-duty load-bearing boards for use in humid conditions.

Plywood (EN636)

EN 636-1 - Plywood for use in dry conditions
EN 636-2 - Plywood for use in humid conditions
EN 636-3 - Plywood for use in exterior conditions

Resin Bonded Particleboard (Chipboard) (EN 312)

P1: general purpose boards for use in dry conditions.
P2: boards for interior fitments (including furniture) for use in dry conditions.
P3: non load-bearing boards for use in humid conditions
P4: load-bearing boards for use in dry conditions.
P5: load-bearing boards for use in humid conditions.
P6: heavy duty load-bearing boards for use in dry conditions.
P7: heavy duty load-bearing boards for use in humid conditions.

LVL (Laminate Veneer Lumber) (EN14279)

LVL/1 :LVL for use in dry conditions
LVL/2 :LVL for use in humid conditions
LVL/3 :LVL for use in exterior conditions

Solid wood panel (EN 13353)

SWP/1 :Solid wood panel for use in dry conditions
SWP/2 :Solid wood panel for use in humid conditions
SWP/3 :Solid wood panel for use in exterior conditions

Flaxboard (EN 15197)

FB1: general purpose flaxboard for use in dry conditions (usually for filling purposes)
FB2: non-load bearing flaxboard for use in dry conditions (usually for further processing, such as veneering).
FB3: flaxboard for interior fitment (including furniture) for use in dry conditions.
FB4: non-load bearing flaxboard for use in humid conditions.

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